Huawei Secret Codes & USSD Dial Codes (2026)
EMUI / HarmonyOS codes
Huawei secret codes span both EMUI and HarmonyOS builds and are aimed squarely at hardware verification. The project menu is the main tool: it groups an automatic full-device test with individual checks for the screen, touch panel, receiver, speaker, microphones, cameras, sensors, vibration motor and charging circuitry, then prints a pass or fail summary you can screenshot.
Huawei also exposes firmware, software and hardware version screens. These are more important on Huawei hardware than most, because devices sold in different regions carry different firmware branches, and knowing your exact build number determines which official update packages will install at all.
Because recent Huawei devices ship without Google Mobile Services, some generic Android diagnostic strings behave differently or are absent entirely. Codes in the diagnostic and info categories below are read-only and safe to try; anything marked destructive triggers a data wipe as soon as it is entered, with no confirmation and no recovery path.
Full Huawei secret code list (41 codes)
Every code below is documented from public device and service documentation. None of these codes erase user data, but always read the risk column first.
| Code | What it does | Category | Risk level |
|---|---|---|---|
| Show IMEI. Displays the device IMEI number. | info | Safe — read only | |
| Testing & Usage Menu. Phone info, battery and usage statistics (older EMUI).Community-reported · unverified | diagnostics | Safe — read only | |
| Project / Engineer Menu. Opens Huawei's project menu (network, background settings, logs). Advanced — changing values can affect the device.Community-reported · unverified | diagnostics | Caution — changes settings | |
| Product Info. Displays product model, region and internal software identifiers. | info | Safe — read only | |
| Extended Project Menu. Opens Huawei's extended engineering menu. Advanced — for diagnostics only.Community-reported · unverified | diagnostics | Caution — changes settings | |
| Hardware / Factory Info. Shows factory and hardware information on some EMUI builds.Community-reported · unverified | info | Safe — read only | |
| Wi-Fi MAC Address. Displays the device's Wi-Fi MAC address. | info | Safe — read only | |
| Call Forwarding Status. Shows whether all-call forwarding is active and to which number. | network | Safe — read only | |
| Forwarding When Unanswered. Shows the number that receives calls you don't answer. | network | Safe — read only | |
| Forwarding When Unreachable. Shows where calls go when your phone is off or has no signal. | network | Safe — read only | |
| Forwarding When Busy. Shows the number that receives calls while you're on another call. | network | Safe — read only | |
| Cancel All Forwarding. Turns off every type of call forwarding on the line. | network | Caution — changes settings | |
| Caller ID Status. Shows whether your number is hidden or shown on outgoing calls. | network | Safe — read only | |
| Factory Data Reset (partial). Clears app data, downloaded apps and accounts. Keeps system apps. Back up first. | reset | Caution — changes settings | |
| GPS Test. Runs a quick GPS test to verify satellite lock and location performance. | diagnostics | Safe — read only | |
| Wireless LAN Test. Opens the Wi-Fi / wireless LAN test screen. | hardware-test | Safe — read only | |
| Vibration & Backlight Test. Runs a test cycle for the vibration motor and screen backlight. | hardware-test | Safe — read only | |
| LCD Display Test. Opens the screen test suite (colors, dead pixels, touch). | hardware-test | Safe — read only | |
| Touchscreen Test. Tests touch response across the screen. | hardware-test | Safe — read only | |
| Proximity Sensor Test. Verifies the proximity sensor used to blank the screen during calls. | hardware-test | Safe — read only | |
| Audio / Melody Test. Runs a speaker and audio playback test. | hardware-test | Safe — read only | |
| Bluetooth Test. Opens the Bluetooth hardware test screen. | hardware-test | Safe — read only | |
| Camera Information. Shows camera firmware details. Avoid the firmware-update option unless you know what you're doing. | diagnostics | Caution — changes settings | |
| Field Test (GSM). Runs a GSM field/signal test. | diagnostics | Safe — read only | |
| Call Waiting Status. Shows whether call waiting is currently enabled. | network | Safe — read only | |
| Service Mode. Opens the service/test mode menu on many devices. Advanced — for diagnostics only. | diagnostics | Caution — changes settings | |
| Call Barring Status. Shows whether outgoing/incoming call barring is switched on. | network | Safe — read only | |
| Enable Call Waiting. Turns on call waiting so a second caller can reach you mid-call. | network | Caution — changes settings | |
| Disable Call Waiting. Turns off call waiting. | network | Caution — changes settings | |
| Build & Version Info. Shows PDA, phone, CSC and build-time information. | info | Safe — read only | |
| Touchscreen Firmware Version. Displays the touchscreen controller firmware version. | hardware-test | Safe — read only | |
| RAM Version. Shows the device RAM type/version. | info | Safe — read only | |
| Packet Loopback Test. Runs an audio/packet loopback hardware test. | hardware-test | Safe — read only | |
| Melody / Audio Test. Plays a test melody to check the speaker. | hardware-test | Safe — read only | |
| Bluetooth Address. Displays the device's Bluetooth MAC address. | info | Safe — read only | |
| Advanced GPS Test. Opens a detailed GPS/location diagnostics screen. | diagnostics | Safe — read only | |
| PDA / Phone / RF Info. Shows PDA, phone, hardware and RF firmware version details. | info | Safe — read only | |
| Power-Button Behaviour. Changes what the power button does on long-press (end call vs menu). Changes a setting. | diagnostics | Caution — changes settings | |
| Backup Media Files. Opens a file-copy screen to back up media (photos, videos, audio). | diagnostics | Caution — changes settings | |
| MediaTek Engineer Mode. Opens the engineer menu on MediaTek (MTK) chipset phones. Advanced — changing values can affect radios. | diagnostics | Caution — changes settings | |
| Google Talk Service Monitor. Legacy GTalk service monitor screen (older Android).Community-reported · unverified | diagnostics | Safe — read only |
How to use Huawei codes
- Open the Huawei dialer and go to the keypad, exactly as if you were dialling a number.
- Type the code precisely as shown, including the leading
*and the trailing#. Autocorrect and paste can drop characters, so type it out. - Most sequences fire the moment the final character is entered — you usually do not press call.
- If the screen does not change, press the call button once; a few USSD strings need it.
- Back up photos, messages and app data before running anything marked destructive, then confirm you are on the right device.
- Nothing at all happening usually means the code is disabled on your firmware or blocked by your carrier — it is not a fault with your handset.
Huawei secret codes — FAQ
Do all Huawei phones support the same secret codes?
No. Code support depends on the model, the firmware version and in many cases the carrier that supplied the handset. Older Huawei models often expose more service menus than the newest releases, because manufacturers gradually lock engineering tools behind signed diagnostic apps. If a code does nothing, it has almost certainly been removed or disabled on your build rather than typed incorrectly.
Is it safe to dial Huawei secret codes?
The codes we mark as "safe" only display information or open a read-only test menu, so they cannot damage your phone. Codes marked "caution" change a setting or start a hardware routine you should understand first, and codes marked "destructive" erase user data instantly with no confirmation dialog. Always back up before running anything in the destructive category.
Why does nothing happen when I enter a code?
Three common reasons: the code is not supported on your firmware, your network operator has blocked the USSD string, or the dialer requires you to press the call button for that particular sequence. Try the code on a different SIM or in airplane mode, and confirm every character including the leading asterisk and trailing hash.
Will using these codes void my Huawei warranty?
Simply reading diagnostic information does not void a warranty. However, changing radio band settings, running write operations in an engineering menu, or performing a factory format can leave your device in a state a service centre may treat as user-caused. Stick to read-only codes unless you are following official repair guidance.
Can these codes unlock a network-locked Huawei phone?
No. Network unlocking requires a carrier-issued unlock code or an official unlock request through your operator. Any site promising a free universal unlock dial code is misleading you. The codes listed here only expose diagnostics, network status, firmware information and factory reset routines.
How do I find my IMEI on a Huawei device?
Dial *#06# on any GSM or LTE phone, including every Huawei model, and the IMEI appears immediately. You can also validate the number with our IMEI checker, which runs the Luhn checksum used by the GSMA to detect mistyped or invented IMEI numbers.